I can only think of the possible effect a DC magnetic field might have on the magnetic compass. This is what Section 15, Magnetic Effect, of DO-160F, is designed to test.
Ed Price [email protected] WB6WSN NARTE Certified EMC Engineer Electromagnetic Compatibility Lab Cubic Defense Applications San Diego, CA USA 858-505-2780 Military & Avionics EMC Is Our Specialty > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of Ken Javor > Sent: Monday, July 25, 2011 8:32 AM > To: [email protected] > Subject: Re: Loudspeaker Certification as Dangerous goods > > Everyone seems to acknowledge some hazard from a dc magnetic field. For my > own edification, other than compass-safe distance, what is the hazard of a > dc magnetic field to an aircraft? > > Ken Javor > > Phone: (256) 650-5261 > > > > From: Doug Kramer <[email protected]> > > Date: Mon, 25 Jul 2011 08:55:59 -0500 > > To: "[email protected]" <[email protected]> > > Conversation: Loudspeaker Certification as Dangerous goods > > Subject: RE: Loudspeaker Certification as Dangerous goods > > > > Also, keep in mind if you ship multiple speakers in a box, how they are > > positioned in the box relative to each other has a huge effect on the fields. > > -Doug Kramer > > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]] On Behalf Of John > Woodgate > > Sent: Sunday, July 24, 2011 11:07 AM > > To: [email protected] > > Subject: Re: Loudspeaker Certification as Dangerous goods > > > > In message <[email protected]>, dated Sun, 24 Jul 2011, > > Scott Douglas <[email protected]> writes: > > > >> Would it be necessary to measure every speaker, one of a series, or the > >> biggest one we make and use that to cover all? > > > > The strength of the external field depends on constructional details, > > not size. If you need to do tests, you need to test one of every product > > (barring variants with different impedances), at least. > > -- > > OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk > > John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK > > When I point to a star, please look at the star, not my finger. The star will > > be more interesting. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
